warwick



n. M, WARWICK.

TYING MACHINE.

APPLICATION FILED JUNE I3 |914.

l ,320,5 l 5 Patented Nov. 4, 1919.

6 SHEETS-SHEET I.

R. M. WARWICK.

`TYING MACHINE.

APPLICATION FILED IuNE I3, 1914.

Patented N ov. 4, 1919.

5 SHEETS-SHEET 2.

R. M. WARWICK.

TYING MACHINE. APPLICATION FILED JUNE I3 |914.

Patented Nov. 4, 1919.

6 SHEETS-SHEET 3 bmw R. Nl. WARWICK.

TYING MACHENE.

APPLICATION r|LED1uNE13.|9x4.

l ,320, 5 l 5., Patented Nov. 4, 1919.

6 SHEETS-SHEET 4.

n y I m o da? 7766665.' [/ZaYZZW R. II/I. WARWICK.

TYING, MACHINE. APPLICATION FILED JUNI-:13. I9I4.

l ,820, 5 l 5 Patented Nov. 4, 1919.

5 SHEETS-SHEET 5.

R. M. WARWICK. TYING MACHINE. APPLlcAloN F1LED1UNE13.1914.

1,820,51 5.. EX Patented Nov. 4, 1919 6 SHEETS-SHEET s.

ving of the tie.

narra seras Parana carica.

ROGERS IVI. WARWICK, 0F CHICAGO, ILLINOIS, ASSIGNOR T0 GENERAL WIRE TIECOMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

TYING-MACHINE.

Specification of Letters Patent.

Patented Nov. 4l, 19H9.,

Application inea June 13, 1914. serial No. 844,894.

To all whom t may concern:

Be it known that I, ROGERS M. WARWICK, citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and use-- ful Improvements in Tying-Machines, and Ido hereby declare the following to be a full, clear, and eXactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to machines for making wire ties, beingparticularly suited for making the class of wire ties used withvalve-filled bags, which bags are commonly used for shipping cement,grain, lime and the like. In tying such bags with wire, it hasheretofore been customary to 'use wires cut to a predetermined length,such Wires being veither in the form of rings, or or' straight lengthsequipped at each en'd with suitable formations for gripping the saidends to manipulate them during the twist- In either case, the length ofwire used has to be the maximum size needed for the tying of the generalsize and type of bag upon which the tie is used, as the actual periphery0f the puckered mouth of the bag will vary considerably in the same lotof bags; consequently the use of ties affording a sufiicient length toallow for such variations has meant a waste of wire for a largeproportion of the bagsactually tied therewith. Moreover, the joining ofthe ends of ties into an endless ring by weld ing the said endsintroduces an uncertain factor of strength; while equipping the ends ofa straight piece of tie wire with easily gripped formations increasesthe labor required in handling suoli ties. In any case, the use of suchties also introduces the personal element of the operator in delerminingthe tension put upon the wire during the twisting, and if this tensionshould be `eX cessive, it may easily lead to a breakage of the wirewhile the bag is being shipped, or

to a likewise objectionable breaking of the.

wire when the tie is being untwisted for opening the bag. 'Moreoven theuse of ties of the class above described, involves. the previouspreparation and storing of the same and a separate handling of each tiewhen being appliedl thereby leaving the operator free to use only onehand in puckering the mouth of the bag and placing the loop in positionfor being tied.

The general object of my invention is to provide a tie-forming machinewhich will not require any previous cutting or preparation of the tiewire; which will manipulate the wire itself Without requiring the latterto be handled or even touched by the operator, thereby leaving theoperator free to use both hands in rapidly and accuratelypuckering andhandling the mouth of the bag; which will automatically` adjust thelength of the Wire used for each individual bag to the minimum actuallyrequired for the same; which will tie each bag with the same tensionupon the Wire, and which will enable the desired tension to be readilyadjustable; which will form the ties from a continuous `supply of Wireand which will straighten out any kinks in the said wire before formingthc corresponding portions thereof into the tie; which will sever thewire required for each tie from the continuous supply of wire; and whichwill form the free ends of the tie wire into an auxiliary loop formationwhereby the same may readily `be manipulated when the mouth of the bagis to be untied. Further objects of my invent-ion are to provide simplemechanism for feeding the wire, and means for adjusting the amount ofthe said feed according to the peripheral size of the mouth of the bagand the desired tension of the wire tied around the said mouth of thebag; for guiding the wire in a loop formation around the mouth of a bag;for gripping the free end of the wire after being thus guided into loopformation;l for releasing the loop wire from the guide means to permit acontraction of the said loop, for twisting the contracted loop Wiredisposed about the mouth of the bag; and for relatively moving the guidemeans with respect to the bag to permit the proper positioning of thebag for tying and the removal of the bag afterthe tie has been formed.Other objects will appear from the following specification and from,,the accompanying drawings, in which- Figure 1 is a plan view of amachine em'- bodying my invention and adapted for tying the nuckeredmouths of bags.

Fig. 2 is a side elevation of the same.

vthrough the Fig. 3 is a front elevation of the same. Fig. 4 is afragmentary view of portions of the wire-retracting mechanism.

Fig.'5 is a vertical section through Figs. 1 .and 2along the line 5-5.

Fig.' 6is a fragmentary view showing the' drawings.

Fig. 12 is an enlarged vertical. section guide means of Fig. 1 along theline 12-12. l I i In the'embodiment `of the drawings, the machine of myinvention includes a base plate or'talble 1 equippedat one end with anentrance tube 2 through which the wire 3.

enters from any suitable source of supply.

From the tube' 2 the wire 3- passes over a plate 4 equipped with a' pairo vertical pivots 5 carrying cams v6, which members 6 normally presentcam surfaces separated by a' spaceslightly O'reater than the diameter ofthe wire 3. cam surfaces 7 of the said pivot `members 6,

the wire passes through a tube formed by opposedA grooves in hardenedsteelV blocks 8,

which grooves are so disposed to straighten out any kinks in the wire.The wire then passes between a pair of feed rollers 9 mountedon'vertical shafts 10 carried by the base 1 and thereafter into 'a tube11 .forming part of a vseries of guides for guidmg the free end of thesaid wire about themouth portion ofthe bag when the said wireA is fedforwardly by means of the feed rollers 9. In the drawings, the saidguide means' comprise a tube 11 extending substantially to theforwardend of the base plate 1 and 'Y a pair of curved guide members 12 and 13,the forward ends of which guide members normally contact withceach otherso that the said members will coact to ailorda substantiallyhorseshoe-shaped tubular guide forthe said wire. The guide member 12first enteredby the wire after the latter leaves the tube 11 ispreferably made of resilient lmaterial and equipped with a slot-facingthe guide member 13 but slightly smaller in di ameter vthan-the wire 3.The other guide member 13 lis preferably made of two hori- I U zontallyseparated elements 13 and 13', both of which elements are pivoted on ahori- 'zon'tal shaft 14, and thefinwardly disposed edges ofY whichelements are normally subfter passing between"v the stantially incontact witheach other. Each of the said members l2 and 13 is carried byan arm 15 mounted upon a vertical pivot 16 and having a portion adaptedto be engaged by a dog 17 carried lby a vertical shaft 18, the said dog17 being preferably in the form of a screw to ermit a ready adjustmentof its length. ssociated with each of the said pivoted arms 15 is atension spring 19 secured at one end to a pin 201 carried by the |base 1of the machine and continuously tending to press the said arm 15 againstthe dog 17 and to move the said arm when the said dog is swung out ofthe way by a partial rotation of the shaft 18.

To effect the forward feed of the wire, which in each case starts withits free end at the forward end of the guide tube 11, I provide the feedwheels' 9 with cylindrical por` tions cut awayfor a part of theirperiphery, the integral peripheral portion being of a length equal tothe maximum length of wire required for forming the general size andtype of tie which is to be made by my machine. Mounted at some distanceabove the Wire-guiding means heretofore describedand supported bybrackets or standards 21 and 22 carried by the base 1 is a shaft 23extending longitudinally of the machine,

which shaft is continuouslyy rotated when the machine is in operation.Secured to the said shaft near the forward end there- Aof is a disk 24carrying a toothedsegment 'a companion bevel gear 28 and a spur gear 29toa gear 30 rigid with respect to one of the feed wheels 9. A'companionto the latter feed lwheel preferably also has a gear wheel 3.1 rigidVtherewith and intermeshing the teeth of the lsaid'whee1g30, so that thesaidy feedLwheels 9 will at all times rotate I in unison but in oppositedirections. It will .be evident from Flg. -5 that as'the teeth of thesegment 25 correspond to .only 'a` small portion of the circumference ofthe wheel 24,- the Wire-feeding mechanism actuated by 1 the said segmentwill only be in operation during a fraction bf each revolution of theshaft 23 carrying toothed segment 2o.

The distance between tions of the two feed .Wheels 9 corresponds thesaid disk 24 Yand Aapproxim'ately'to the diameter of. the -wire 3, sothat when the said feed wheels are-ro tated, the will'coperate to propelthe wire 3 for a istan'ce corres ending to thelperipheral length ofA thesaid opposed portions of the 'feed rollers, whereupon the guide thecylindrical por:

members 12-and 13 will cause the forward Y portion'of the wire.l to bedisposed loop formation` (as indicated in and will feed the tip ofthewire. into a ioriz'ontal ist bore 32 in the head 33 carrying the guidetube l1. The said head is rotatably mounted in a journal 34 carried bythe base l, the

axis of said journal being in alinement with' the rear portion of theGuidetube 11 and the entrance tube 2 of tie machine. The member 33carries at one end a pinion 34 adapted to intermesh with teeth 35disposed upon a ortionof the periphery of the disk 24, where y the saidmember 33 (which forms the twisting head of the machine) will be rotatedseveral times during each rotation of the shaft 23 carrying the diskequipped with the peripheral teeth 35. To prevent the extreme tip of thewire from slipping out of the said bore 32 While the head 33 is beingrotated to twist the ends of the wire loop about each other, Ipreferably provide a pawl 36 pivotally mounted in the forward end of thetwisting head 33 adjacent to the said bore 32, the said pawl beingcontinuously moved in one direction by a spring 37 and being equippedwith a forwardly projecting lug 38. When the free end of the wire isbeing fed into the bore 32, it moves the said pawl 36 slightly againstthek pressure of the spring 37, after which the said spring and pawlcoperate to prevent a retraction of the tip portion of the wire from thesaid bore 32. However, the said tip may be released by moving the pawl36 through pressure on the lug 38, for which purpose I provide a plunger39 carried by an arbor-carrying slide 40 which will be describedhereinafter, and which plunger is adapted to engage the said lug 38 toswing the pawl 36 about its pivot and release the tip of the wire.

When the machine is to be used for tying the mouths of bags, Ipreferably equip the base 1 with a forwardly curved projection 42 whichwill aid the operator of the machine in placing the bag in the desiredposition, and against which the mouth of the bag will 'bear when thewire looped around the said mouth is being tightened by a twistingoperation. It will be obvious, h`owever, that the strain thus put uponthe thrust member 42 and upon the wire of the loop while the latter isbeing twisted will vary with any variation in the exterior diameter ofthe mouth portion of the bag, and likewise with the difference incompressibility afforded by bags of substantially the same size but madeofI different materials.

To allow for such variations without, using a surplus of wire andwithout imposing an excessive strain upon the wire forming the loop, Iprovide spring-regulated means for contracting the loop to the necessarysize and tension required for each particular bag before performing thetwisting operation. For this purpose, I mount upon the shaft 23 near therear end of the machine a disk 4l equipped upon its forward face with asegmental cam 42 for engaging the head 43 of a tension lever 44pivotally mounted upon brackets 45 carried by the standard 21 at therear of the niachine. The lever 44 is preferably formed with a loopportion permitting the shaft 23 to pass freely therethrough and isprovided near its lower end 46 with a perforation housing the shank of abolt 47. The bolt 47 also passes loosely through a perforation in alever 48 likewise pivoted upon the brackets 45 and equipped at its lowerend with a toe portion 49 of sufficient width for simultaneouslyrengaging upwardly projecting lugs 5() carried respectively by the twocams 6. Surrounding a portion of the shank of the bolt 47 and interposedbetween the nut 51 of the said bolt and the forward face of the lever 48is a compression spring 52 which may be adjusted as to its compressionby varying the position of the nut 51 upon the said bolt. This spring isnormally adjusted to a compression corresponding to a power considerablyin excess of that required for moving the cams 6 and forcibly retractingthe wire 3 by the engagement thereof between the opposed surfaces of thesaid cams. Consequently, when the disk 4l is rotated so that the head 43is moved from the position shown in Fig. 2 to that shown in dotted linesin the same figure. the jointly pivoted levers 44 and 48 will movetogether as if they had been rigidly bolted to each other. However. assoon as the resistance afforded either by the engagement of the wireloop with the mouth of the big or by the forward pull on the wire causedby the strains of twisting the ends lof the said loop exceeds thepressure for which the. sprin 52 is adjusted, the said spring willpermit the lower end of the lever 44 and the adjacent portion of thelever 48 to separate as shown in Fig. 4. Consequently, the extent towhich the wire loop is contracted bv the coperating action of the cam42, levers 44 and 48 and cams 6 will be automatically varied or adjustedfor each individual loop which is to be tied; and likewise theretraction of the wire for contracting the loop will be relaxed whenevernecessary so as to prevent an overstraining of the wire while the latteris being twisted. A similar automatic loop-tensioning will also beaccomplished; v when using my machine for tying the crossed wires 79 ofiron rods as used for making concrete reinforcements. in which caseJ thethrust member 80 is provided with grooved tips 81 asshown in Fig. 6.

The shaft 23 also has secured thereto at the forward end of the machinea cam 53 presenting 'a raised portion 54 adapted successively to engagerollers 55 and 56, which rollers are carried respectively by levers 57and 58 pivotally mounted at the forward end of the framework of themachine. The other ends of the said levers are equipped with forksrespectively engaging pins 59 and 60 projecting from horizontallydisposed slides 61 and 62 disposedl in guideways at the front of themachine and adapted when moved to engage the free end portions of thewire loop. The slide 62 is equipped upon the edge facing the wire loopwith a cutting edge, to sever the adjacent portion of the wire loop fromthe adjacent part of the supply o'f wire as housed by the tube 11. Theforward end of the frame is also equipped with 'vertically disposedguideways 63 housing the slide 40 carrying the arbor 64, the said slidetogether with the levers 57 and. 58 being normally held in operativeposition by interconnected springs 65.

To maintain the twisting head of the machine stationary except duringthe above described twisting operation, I equip a portion of the saidtwisting head with a peripheral recess 66 adapted to be engaged by apawl 67 and thereby kept from rotation as long as the said pawl isinterlocked therewith. The pawl 67 is carried by a lever 68 pivotednearl its center upon the framework of the machine and is normallypressed toward the said raised portion of the twisting head by a spring69. The other end of the lever 68 carries a roller 70 adapted to beengaged by a segmental cam 71 mounted upon the rear of the disk 24, thesaid engagement serving to rock the said lever so as to disengage thepawl 67 and permit the twisting head to be rotated by the coperation ofthe teeth 35 and the pinion 34.

The disk 24 also carries upon its rearface two arcuate cam formations 72and 73 so disposed as substantially simultaneously to engage rollers 74and 7 5 respectively, the said rollers being mounted at the upper end ofbellcranks 76 and 77 terminating in the arms or dogs 17 heretoforedescribed as bearing against the pivoted arms 1-5 which support themembers of the substantially horseshoe-shaped guide mechanism. The saidformations 72 and 73 are relatively so disposed that they willsimultaneously engage and leave the rollers 74 and 75 respectively,thereby spreading simultaneously and closing the halves 12 and 13 tograsp the object which is to be surrounded by the loop of Y the tie, andthereafter permitting the springs 19 to simultaneously open the same.

- While the resiliency of the jaws of the guide member 12 will readilypermit the looped wire to be forcibly drawn out of the and having itstip disposed near a peripheral portion of the disk 24, so that the saidtip mayenter a recess 82 in the said disk, thereby temporarily rotatingthe said pivot 14 and opening the jaws (as shown in Fig. 12), the saidjaws being normally held closed by a-spring 83.

It will be obvious from Fig. 11 that the shape of the secondary loo 84formed by the coperation of the sli e 40 with the slides 61 and 62 willdepend on the shape of the said arbor 64, and that the said auxiliaryloop will afford a convenient means for untwistingthe main loop 85 ofthe tie when the bag is to be opened. However, the formation of thesecondary loop may easily be avoided by merely removing the arbor 64around which the said loop is formed, thereby also adapting my machinefor tying objects (like the crossed wires 29 of Fig. 6), where itis notdesired to aiford means for untying the main loops. Moreover, it will beevident that the various details of -construction herein disclosedmightbe varied in -many ways without departing from ithe spirit of myinvention, hence I do not Wish to be limited to the precise embodimentherewith pictured and described.

I claim as my invention:

1. Apparatus for tying objects with wire, including mechanism coactingwith the object for forming and contracting a loop of wire about saidobject, said mechanism including wire feeding means, wire bending meanswhereby the wire is looped around the object to be tied, means forsubsequently contracting the wire tightly about the object, l andmechanism for tying said wire while so contracted.

2. Apparatus for tying objects with wire, including mechanism forforming a loop of wire adapted to receive an object, mechanism coactingwith the object for contracting said loop around the latter, andmechanism for tying said loop while contracted.

3. Apparatus for tying the puckered mouth of a bag, comprisingfeedsmechanism for propelling wire, guide means disposed to receive thesaid mouth of the bag and coacting with the said feed mechanism todispose the end portion of the wire in a loop about the same; clam-pingmeans for gripping the end of the wire when thus disposed, mecha-' nismfor partially retractin the wire to co ntract the said loop about t emouth of the bag and withdraw the same from the said guide means,mechanism for relatively twisting the wire portions forming the ends ofthe said contracted loop, and cutting means for severing the wire fromthe said relatively twisted portions thereof.

4. Bag tying apparatus including feed mechanism lfor propelling wire,guide means disposed near the said mouth of the bag and adapted toreceive the endl portion of the wire when propelled 'by the said feedmech-- anism and to guide said end portion of the wire to form a loopabout the mouth of the bag; clamping means disposed near the free end ofthe resulting loop, mechanism for actuating the said clamping means togrip the said free end of the wire, mechanism for partially retractingthe main portion of the wire to contract the said loop about the mouthof the bag, mechanism for relatively twisting the wire portions formingthe ends of the said contracted loop, cutting means for severing thebody of wire from the said twisted portions thereof, and mechanism forreleasing the said clamping means after the said severing of the wire.

5. Apparatus for making a tie of wire; including mechanism forpropelling the wire, guide means coperating with the said feed mechanismto dispose the end portion of the wire in the form of a loop, mechanismfor retracting the main portion of the wire to efect a contraction ofthe said loop, and means coacting with the object to be tied actuatedsubstantially simultaneously with the said retraction of the Wire forreleasing the said guide means from the said loop portion of the wire.

6. Wire tie-forming apparatus, including, in combination wire feedmechanism and guide means for disposing the end portion of the wire inloop formation, mechanism for relatively twisting the portions of thewire forming the ends of the said loop, cutting means for severing thesupply of wire from the portion connecting the same to the said twistedloop, and mechanism for forming the ends of the said relatively twistedportions of the wire into auxiliary loops.

7. Wire tie-forming apparatus including, in combination, wire feedmechanism and guide means for disposing the end portion of the wire inloop formation, mechanism for relatively twisting the portions of thewire forming the ends of the said loop, cutting means for severing thesupply of wire from the portion connecting the same to the said twistedloop, and mechanism for forming the ends of the said relatively twistedportions of the wire into auxiliary loops relatively disposed to form akey for manually opening the tie.

8. Apparatus for making a tie of wire, including mechanism for ropellingwire, guide means coperating wlth the said feed mechanism to dispose theend portion of the wire in the form of a loop, mechanism col acting withthe object to be tied for retracting the main portion of the wire toeEect a contraction of the said loop, and spring means controlling thesaid retraction of they Wlre. 4

9. Apparatus for tying the puckered mouth of a bag, comprising incombination, feed mechanism for propelling the wire,

guide means disposed near the said mouth of the bag and coacting withthe said feed mechanism to dispose the end portion of the wire in a loopabout the mouth of the bag; clamping means for gripping the end of theWire when thus disposed, mechanism coacting with the object to be tiedfor partially retracting the Wire to contract the said loop about themouth of the bag, and into engagement with the latter, means associatedwith the said means eecting engagement of the loop with the mouthportion of the bag for controlling the said retraction of the wire, andmeans for relatively twisting the wire portions of the said contractedloop.

10. Apparatus for making a tie of wire, including mechanism forIpropelling wire, guide means coperat'ing with the said feed mechanism todispose the end portion of the wire in the form of a loop, mechanismcoacting with the object to be tied for retracting the main portion ofthe wire to effect a contraction of the said loop, the said guide meansincluding a pair of relatively movable members normally engaging thelsaid loop to prevent contraction of the latter: and means forrelatively moving the said members to permit the said loop to be drawnoutY of engagement therewith, thereby permitting the saidwire-retracting mechanism to contract the said loop. y

11. 1n a wire-tie forming. machine, mechanism for moving a wire,comprising a pair of pivoted cams `disposed on opposite sides of thesaid wire, each thereof equipped with a projection, a pivoted leverengaging both of the said projections, an auxiliary pivoted lever, aspring connecting the said levers, and a cam engaging the said auxiliarylever.

12. ln a wire-tie forming machine, mechanism for moving awire,comprising a pair of pivoted cams disposed on opposite sides of the saidwire, each thereof equipped with a projection, a pivoted lever engagingboth of the said projections, an auxiliary pivoted lever, a springconnecting the said levers, a cam engaging the said auxiliary lever, andmeans for adjusting the tension of the said spring. i

13. Apparatus for tying the puckered mouth of a bag, comprising incombination, feed mechanism for propelling the end portion of the wire,guide means disposed near the said mouth of the bag and coacting withthe said feed mechanism to dispose the end portion of the wire in aloopabout the mouth of the bag; the said guide means including a pair ofrelatively movable guide members normally coperating to form acontinuous and y substantially horseshoe-shaped guide about the saidmouth of the bag; means for relatively moving the said guide members toseparate their adjoined ends, thereby permitting the normal positioningof the said mouth of the bag and narrower than the4 diameter of the'saidwire, the portions of the said member on opposite sides of the said slotbeing adapted to be sprung apart.

upon a pull on the wire to permit the passage of the wire through thesaid. slot.

l5. Wire tie-forming apparatus including, in comb' ation, feed mechanismand guide means or disposing the free end of the wire in loop formation,mechanism for relatively twisting the portions of the wire forming theends of the said loop, cutting means for severing the supply of wirefrom the portion connecting the same to the said twisted loop, and meansfor locking the said twisting mechanism against movement during theactuation of the said feed and cutting mechanisms."

16. Bag tying apparatus including, in com-` bination wire feedmechanism, guide means disposed near the mouth of the bag nd adapted toreceive the end portion of the wire when propelled lby the said feedmechanismr and to guide an'end portion of the wire to form a loop aboutthe mouth of the bag; clamping means disposed near the free end of theresulting loop, mechanism for actuating the said clamping means to gripthe said free end of the wire, mechanism ooacting with the mouth of thebag for partially retracting the main portion of the wire to contractthe said loop about the mouth of the bag, mechanism for relativelytwisting the wire portions forming the ends of the said contracted loop,cuttingmeans` for severing the supply of wire from the said twistedportions thereof, and mechanism for releasing the said clamping meansproximate to the said severing of the wire, andbending mechanism forforming the resulting free ends of the wire ltie into aux iliary loops.

17. l/Vire tie-forming apparatus including, in combination, a supportfor the object, a thrust member adapted to engage the said object,mechanism for feeding the wire from the said supply thereof, guide meansfor guiding the wire in loop formation about a portion of the saidobject adjacent to the thrust member, tension lmeans for retracting thewire to draw the said loop into forcible engagement with'the saidportion `of the object, and'twisting means for twisting the ends of thesaid loop, the said thrust member so disposed with respect tothe loopand object supporting means as to maintain 18. ln a wire-loopv formingmachine, thecombination with a rotatable twisting head equipped with awire-duct terminating at one side of the axis of the head and equipped Ywith a wire tip receiving recess disposed on the head diametricallyopposite the said ter- Y minus of the duct, -means for feeding wire,

of guide means for guiding the' end portion of -a wire in loop formationfrom the said terminous to the said recess, means carried by thetwisting head for cl-amping the said free end of the wire, means forreleasing the wire from feeding means as the same 1s engaged by saidclamping means, and meansfor rotating the twisting head to effect arelative twisting of the end portions vof the said loop.

19. In a wire-loop forming machine, the combination with means forfeeding wire, and means for disposing an end portion of the same in loopformation, of means for gripping the free end of the wire, meanscoacting with the object to be tied for retracting the main portion ofthe wire to afford a loop of the desired size, means for holding thesaid main portion ofthe wire under tension, and means for relativelytwisting wire portions constituting ends of the said loop whilemaintained under said tension..

20. Apparatus for tying objects with wire, including mechanism forforming a tie, object-engaging means, mechanism for engaging the tiewith the object and for drawing the latter under tension tightly aboutthe object, and mechanism for closing the tie while under tension.

in testimony whereof l have signed my name in presence of 'twosubscribing witnesses.

Roenes M. wAnwicK.

Witnesses Gf. M. 'Nnvmnm ALBERT Scnnrnn.

ico

Miti

